I had a funny little conversation with a 10 year-old this weekend.
10yrs: "I'm in fourth grade, but really I should be in fifth grade."
M: "Really? What happened? Why are you in fourth grade then?"
10yrs (resignedly): "I had to do kindergarten twice."
M (trying to be reassuring): "Oh, I think I know someone else who had to do that."
10yrs: "It's not a good thing you know."